Pere L. Pallé is a pioneering astrophysicist in the field of helioseismology and head of the IAC's Research Group for Helio- and Asteroseismology. He completed his undergraduate studies and PhD at the University of La Laguna, Spain, and is deeply involved in the deployment, operation and scientific exploitation of the first earth-based international helioseismology networks (BiSON, IRIS, GONG), space missions (such as GOLF/SoHO), and asteroseismology networks (SONG). His research is focused on the instrumentation, analysis and interpretation of solar and stellar internal structures and dynamics by means of seismology tools. César Esteban is a lecturer at the Astrophysics Department of the University of La Laguna and researcher at the Instituto de Astrofísica de Canarias in Spain. He completed his undergraduate studies and PhD at the University of La Laguna, where he was head of the Astrophysics Department from 2010 to 2011. He researches the physical structure and chemical composition of ionized nebulae, the chemical evolution of galaxies, and the astronomy of ancient cultures. He coordinates different research projects and is a member of various scientific societies and governing boards.